Features: Output 12 laser lines for finer positioning, with self-leveling system, flexibility and stability. 360 rotatable base, and equipped with fine adjustment mechanism, can make the machine quickly find the target. 1/4 screw size for easy connection, it can be used with tripod to adjust the working height of the machine. Comes with wall-mounted bracket, can be easily attached to the floor tiles, wall stickers, and ceilings, all 7mm pitch. Waterproof and dustproof, suitable for both indoor and outdoor use. Adopts optical glass, K9 material, fine transmission, with clear laser light. Equipped with self-test calibration function, 3 automatic leveling, but if the angle is over 3, the laser light will keep blinking reminding you to reset them on a flat ground. Rotation knob design, clockwise rotate to open it, anticlockwise rotate to close it. Two touching buttons design, one OUT/H button, one V button, horizontal line and vertical line with a clearly division. The button is wear resistant, with high sensitive to switch the line mode quickly, and with comfortable hand feeling. The T-shape bracket has 360 rotation base, with 7mm wall mounted distance and equipped with fine adjustment mechanism, can make the machine quickly find the target(1/4 screw size). Easy to carry with the case, providing quick and convenient mobility and storage. Extension Bar: Made of thicken aluminum alloy material, firm with fine load-bearing, not easy to deformed and not easy to break. Three heights adjustable, you can adjust according to your demands easily. Equipped with bubble-level to help you to check whether the tripod is horizontal or not. Equipped with rocking bar to adjust to height of the tripod, smooth and effort saving. With fixed plectrum to control to extend length to lock it tightly. Suitable to most of laser level with 5/8 interface. Note: The laser output maker is located on the output hole. Do not stare directly at the laser light. Do not disassemble the instrument and perform internal repairs by yourself. This instrument meets the laser radiation safety rating standard.